Seiko Cal. 4581 - 663

The 4581-663 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4581 caliber with 33j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-baf8a48436cc]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

14.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

150m

Dial Color

Navy

Jewels

33j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1973

Related Models

• Seiko 6684-174
• Seiko 6662-393
• Seiko 6127-950
• Seiko 6348-259
• Seiko 6390-945
• Seiko 7082-113
• Seiko 6223-257
• Seiko 4510-443
• Seiko 6143-548
• Seiko 4463-713
• Seiko 5616-692
• Seiko 3817-279